Ab initio modelling of Y-O cluster formation in γ-Fe lattice

Ab initio modelling of Y and O impurity atoms as well as VFe vacancies in the fcc‐Fe lattice is performed in order to calculate the interactions between these defects, which are important for understanding of nanoparticles’ formation within the oxide dispersed strengthened steels. Large scale parall...

Full description

Saved in:
Bibliographic Details
Published in:Physica Status Solidi. B: Basic Solid State Physics 2016-11, Vol.253 (11), p.2136-2143
Main Authors: Gopejenko, Aleksejs, Zhukovskii, Yuri F., Kotomin, Eugene A., Mastrikov, Yuri A., Vladimirov, Pavel V., Borodin, Vladimir A., Möslang, Anton
Format: Article
Language:English
Subjects:
Binding energy
defect migration
Defects
density functional theory calculations
Formations
Impurities
iron
Lattice vacancies
Lattices
Mathematical models
Modelling
oxygen
vacancies
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ab initio modelling of Y and O impurity atoms as well as VFe vacancies in the fcc‐Fe lattice is performed in order to calculate the interactions between these defects, which are important for understanding of nanoparticles’ formation within the oxide dispersed strengthened steels. Large scale parallel calculations based on plane‐wave method realised in VASP computer code show that VFe vacancies considerably influence the binding between the impurity atoms. In this study, we present the results of performed calculations providing the detailed information about the binding energies between the defects, the changes of their effective charges as well as displacements of the substitute atoms relatively the host atom positions. The energy barriers for the migration trajectories of impurity atoms have been also found by performing the large‐scale calculations within the nudge elastic band method.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201600472